A Facile Electrochemical Synthesis of Graphene from Battery Waste for Sensing Application

摘要

Graphene derived from graphite battery waste has been successfully synthesized through a simple electrochemical method. A single chamber electrochemical setup consists of a graphite-graphite electrode as anode and cathode, respectively, was employed to synthesize the graphene material. The various voltages of 5, 10, and 15 V were applied for 1 h in 0.1M (NH_4)_2SO_4 as supporting electrolyte resulting in a different weight of graphene fraction. The synthesized graphene was investigated by using Fourier-transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) to confirm the functional groups and the transformation structure of graphite precursor, respectively. Furthermore, cyclic voltammetry (CV) was performed in K_3Fe(CN)_6/K_4Fe(CN)_6 system to evaluate the electrochemical properties of the synthesized graphene. The mass transport on the synthesized graphene was mainly diffusion-controlled shows good performance as an electrochemical sensor. This result revealed the possibility of graphene-derived from no cost material such as battery waste as working electrodes material for sensing application.